Advancing the State of the Art in Particulate Dispersal Modeling in Underwater Explosion Application
Abstract
Modern underwater explosives and emerging underwater concepts rely on multiphase technology to drive rapid heat release and attain higher performance. It is therefore important to develop an in-depth understanding of, and capability to model, the multiphase dynamics and reactions that drive these applications. A large gap in our understanding of closure models exists in the detonation and early interaction between the particulate and the fluid phases. For a particle-laden underwater explosive these early stages are critical. The proposed research will address this gap by developing sub-grid closure models that can be applied in multiphase DYSMAS simulations for improved accuracy in future underwater explosion simulations. We have investigated in detail the multiphase dynamics occurring as an initial detonation wave and subsequent reflected and transmitted waves sweeps over a bed of particles using microscale DNS. These fully-resolved simulations have consider systems with O(1000) particles, and they provide fundamental information from first principles at an unprecedented level of detail. The proposed work will develop sub-grid closure models and evaluate their fidelity when used as point-particle models in Euler-Lagrange simulations by comparing against the DNS results. The validated sub-grid models will then be used in mesoscale and macroscale simulations of an underwater explosion events
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 01, 2022
- Source ID
- N000142212069
Entities
People
- Sivaramakrishnan Balachandar
Organizations
- Office of Naval Research
- United States Navy
- University of Florida